Sunday, March 3, 2013

FileSystemModel.java File to be used with jTree

3:14 AM


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import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;

/**
*
* @author ProgrammingKnowledge
*/
public class FileSystemModel implements TreeModel {

private File root;
private Vector listeners = new Vector();

public FileSystemModel(File rootDirectory) {
root = rootDirectory;
}

@Override
public Object getRoot() {
return root;
}

@Override
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
/* for (int j = 0; j< children.length; j++ ){
System.out.println(children[j]);
} */

return new FileSystemModel.TreeFile(directory, children[index]);
}

@Override
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();

if (fileList != null) {
return file.list().length;
}
}
return 0;
}

@Override
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
}

@Override
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
}
}
return -1;

}

@Override
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = {getIndexOfChild(parent, targetFile)};
Object[] changedChildren = {targetFile};
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);

}

private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
}
}

@Override
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
}

@Override
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
}

private class TreeFile extends File {

public TreeFile(File parent, String child) {
super(parent, child);
}

@Override
public String toString() {
return getName();
}
}
}

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